Implanted metal-nitrogen active sites enhance the electrocatalytic activity of zeolitic imidazolate zinc framework-derived porous carbon for the hydrogen evolution reaction in acidic and alkaline media
| Autor: | Chao Yang, Xi Wang, Jingjing Yang, Yongwei Zhang, Jiaoe Dang, Menglong Sun, Shuangxi Yuan, Changwei Dang, Sining Yun, Lishan Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nitrogen
chemistry.chemical_element 02 engineering and technology Zinc Overpotential 010402 general chemistry 01 natural sciences Catalysis Biomaterials Metal chemistry.chemical_compound Colloid and Surface Chemistry Catalytic Domain Imidazolate Tafel equation Nanotubes Carbon Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering visual_art Zeolites visual_art.visual_art_medium 0210 nano-technology Porosity Carbon Hydrogen |
| Zdroj: | Journal of Colloid and Interface Science. 604:441-457 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2021.06.152 |
| Popis: | Developing electrocatalysts with excellent catalytic performance and superior durability for hydrogen evolution reaction (HER) remains a challenge. Herein, metal-nitrogen sites (M–Nx, M = Ni and Cu) are successfully implanted into zeolitic imidazolate zinc framework (ZIF-8)-derived nitrogen-doped porous carbon (ZIF/NC) to prepare Ni-ZIF/NC and Cu-ZIF/NC electrocatalysts for the HER. These M–Nx active sites significantly enhanced the electrocatalytic activities of Ni-ZIF/NC and Cu-ZIF/NC. Metal Ni acted as a catalyst for catalysis of Ni-ZIF/NC to form carbon nanotubes-like structures, which provided convenient ion transmission pathways. Owing to its special morphology and an increased number of defects, Ni-ZIF/NC displayed superior electrocatalytic activity in the HER compared to those of Cu-ZIF/NC and ZIF/NC. In an alkaline environment, Ni-ZIF/NC exhibited an overpotential at the current density of 10 mA cm−2 (η10) of 163.0 mV and Tafel slope of 85.0 mV dec−1, demonstrating an electrocatalytic property equivalent to that of Pt/C. In an acidic environment, Ni-ZIF/NC yielded a η10 of 177.4 mV and Tafel slope of 83.9 mV dec−1, which were comparable to those of 20 wt.% Pt/C. Moreover, Ni-ZIF/NC and Cu-ZIF/NC also exhibited superior stabilities in alkaline environments. This work offers a valuable strategy for controlling the morphology and implanting M–Nx active sites into carbon for designing novel catalysts for use in alternative new energy applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect